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Thread: ArrayIndexOutOfBounds

  1. #1
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    Default ArrayIndexOutOfBounds

    Ok so I'm working on this program which passes the elements on an array into an array object. It compiles but I keep getting an ArrayIndexOutOfBoundsException: 0 error.
    Its happening at tempArray[index] = i; but I can't seem to figure out how it's out of bounds. Any thoughts?

    public class MyArray {
        private int size;
        private int[] tempArray = new int[size];
        private int index = 0;
     
        public MyArray(){
            size = 15;
        }
     
        public void add(int i){
            if(index < size){
                tempArray[index] = i;
                index++;
            }
            else{
                System.out.println("Array is full");
            }
        }
     
        public static void main(String[] args) {
            int[] array1 = {3,2,4,5,1};
     
            MyArray test1 = new MyArray();
     
            for(int i= 0; i < array1.length; i++){
                System.out.println(array1[i]);
                test1.add(array1[i]);
            }
        }
    }


  2. #2
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    Default Re: ArrayIndexOutOfBounds

    What do you suppose size = ? when tempArray[] is initialized?

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  4. #3
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    Default Re: ArrayIndexOutOfBounds

    Oh wow, I was assuming the array was getting initialized in the constructor but it wasn't. Stupid mistake. Fixed it and it works fine. Thanks

  5. #4
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    Default Re: ArrayIndexOutOfBounds

    Glad to help.

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